JPH10296124A - Air purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an ionic wind velocity from being lowered due to the pressure loss in an electric dust collecting means to increase air blowing volume and also to prevent dust collecting performance from being deteriorated to enhance an air purifying effect. SOLUTION: This air purifier is provided with an ionic wind inducing means 5 for inducing an ionic wind to form a flow of the wind flowing from the suction side toward the blowout side and an electric dust collecting means 6 having a dust collecting electrode 40 arranged almost in parallel to the flow of the ionic wind. In this case, on the downstream side of the downstream side of the electric dust collecting means 6, a second ionic wind inducing means 16 formed by an electrostatic discharge part 3 and a counter electrode part 4 for inducing a second ionic wind for accelerating the wind velocity is arranged. Between the second ionic wind inducing means 19 and the electric dust collecting means 40, a plus ion cutoff means 80 for preventing plus ions from being moved from the electrostatic discharge part 3 to the dust collecting electrode 40 is inserted. A part of the plus ions are prevented from being moved from the electrostatic discharge part 3 to the dust collecting electrode 40 to prevent dust collecting performance from being deteriorated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier for purifying indoor air.

[0002]

2. Description of the Related Art Conventionally, in an air purifier that sucks air in a room and cleans it with an electric dust collecting means, it is necessary to provide a blowing means for blowing out the air. There are a type that rotates a fan and a type that induces ion wind. The former fan type can take a large amount of air, but on the other hand, has the problem of increasing the noise.Therefore, if the fan type is used in a place where noise is likely to be a problem, such as the bedroom, Induction type is used.

[0003]

However, in the conventional ion wind-inducing type, the electric dust collecting means is disposed downstream of the ion wind-inducing means, and the electric dust collecting means is perpendicular to the flow of the ion wind. In general, a dust collecting unit is arranged in the air conditioner, so that the ion wind speed is reduced due to the pressure loss of the dust collecting unit, the dust collecting performance is deteriorated, and the indoor air cleaning effect cannot be improved. was there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and aims to prevent a decrease in ion wind speed due to a pressure loss in an electric dust collecting means, to increase a blowing amount, and to prevent deterioration of dust collecting performance. It is an object of the present invention to provide an air purifier capable of improving the indoor air cleaning effect.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a flow of wind flowing from a suction side to a blowing side by inducing ion wind with kinetic energy of positive ions generated by ionization of air. And an electric dust collecting means 6 having a dust collecting electrode 40 arranged substantially parallel to the flow of the ion wind. On the downstream side, a second ion wind inducing means 19 formed of a discharge unit 3 for inducing a second ion wind for accelerating the speed of the wind and a counter electrode unit 4 is provided, and a second ion wind inducing means 19 is provided. Positive ion blocking means 80 for preventing the movement of positive ions from the discharge section 3 to the dust collecting electrode 40 is interposed between the wind inducing means 19 and the electric dust collecting means 6. And be configured this way , It is possible to increase the blowing rate to prevent deterioration of the ion wind by the pressure loss in the electric precipitator means 6 by a second ion wind inducing means 19,
Since the positive ion blocking means 80 can prevent some positive ions from moving from the discharge unit 3 to the dust collecting electrode 40, it is possible to prevent deterioration of dust collecting performance.

Further, it is preferable that the positive ion blocking means 80 be constituted by a net 80a made of an insulating material. In this case, the net 80a is positively charged by the positive ions, so that the net 80a extends from the discharge unit 3 toward the net 80a. Positive ions to move can be reliably prevented from repelling the net 80a and moving to the dust collecting electrode 40.

The positive ion blocking means 80 is constituted by a net 80b made of a conductive material.
b is preferably grounded. In this case, the positive ions from the discharge part 3 are attracted to the net 80b made of a conductive material and flow to the ground electrically, so that the positive ions from the discharge part 3 are collected by the dust collecting electrode 40. Can be reliably prevented from moving.

It is preferable that the nets 80a and 80b also serve as pre-filters. In this case, dust that has not been collected by the electrical dust collecting means 6 is collected by the nets 80a or 80b.
And there is no worry that the dust will be blown into the room as it is.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. FIGS. 4 to 8 show the structure of the air purifier 1 of the ion wind induction type. A suction port 11 is provided on the lower surface of the main body 2, and a blowout port 12 is provided on the upper surface of the main body 2. A body cover 1 is provided on both front and rear sides of the body 2.
3 and 13 are attached to the main body cover 13 by pressing a cover attaching / detaching button 95 provided on a side surface of the main body 2.
Is detached from the main body 2. In addition, FIG.
6 shows a state in which the first and second discharge electrode blocks 15 and 16 are taken out.

As shown in FIG. 1, a pre-filter 20, a first discharge electrode block 15 having a discharge part 3 and a counter electrode part 4, and an electric The dust collecting means 6 and the second discharge electrode block 16 having the discharge part 3 and the counter electrode part 4 are arranged in this order, and the electric discharge means 6 and the second discharge electrode block 16 are disposed in this order. Is provided with a positive ion blocking means 8 described later.

First, the pre-filter 20 is for collecting relatively large dust, and as shown in FIG.
It comprises a frame 21 and a net 22 made of, for example, a synthetic resin held by the frame 21. This pre-filter 2
0 is detachably attached to the main body 2. FIG.
Reference numeral 23 denotes a handle for attachment and detachment. The first discharge electrode block 15 constitutes the dust charging means and the first ion wind inducing means 5, and as shown in FIGS.
A rectangular electrode frame 30 that opens up and down;
And a counter electrode plate 35 made of a plurality of conductive thin steel plates arranged in parallel with the upper portion inside the electrode frame 30. The discharge wire 31 is attached to the electrode frame 30 with both ends tensioned by a coil spring 32. In addition, a tube 33 for insulation protection is put on a contact portion between the discharge wire 31 and the electrode frame 30 at an intermediate portion. The discharge wire 31 is formed of, for example, a tungsten wire or a piano wire having a small wire diameter, and is electrically connected to the discharge wire terminal portion 34.

A plurality of counter electrodes 35 disposed above the discharge wire 31 are provided with insulating coating portions 36 having insulating coatings at both ends.
Are fixed to the electrode frame 30 and the insulating coating portion 36
A counter electrode terminal portion 37 is provided at a portion extending integrally from the electrode frame 30 and reaching the end surface of the electrode frame 30. The first discharge electrode block 15 thus formed is detachable from the main body 2 by removing the main body cover 13. Body 2
When mounted on the main body 2, the main body 2 is supported by the main body 2 by support members (not shown) arranged on both sides of the main body 2, and both support members are provided with contact springs 39a and 39b, respectively. One of the contact springs 39a and 39b is in contact with the discharge wire terminal portion 34, and the other is in contact with the counter electrode plate terminal portion 37. The discharge wire 31 is contacted through the contact springs 39a and 39b.
Is applied with a voltage of +6.5 kV, for example.
Is applied with a voltage of -6.5 kV, for example.

[0013] As shown in FIG.
It is made of a conductive thin steel plate, and is formed in a substantially flat plate shape substantially parallel to the flow direction A (FIG. 1) of the ion wind. The dust collecting portion 6a includes a dust collecting electrode 40 disposed at a central portion of the main body 2 in the front-rear direction, dust collecting papers 41 disposed on both front and rear surfaces of the dust collecting electrode 40, and a dust collecting electrode 41. And a pressing portion 43 disposed at the lower end of the dust collecting electrode 40 via a hinge portion 43a so as to be rotatable up and down, and the pressing portion 43 is a permanent magnet magnetically attracted to the dust collecting electrode 40. 49 are provided. After the dust collecting paper 41 is placed on the upper part of the dust collecting electrode 40, both ends are bent downward, and then the holding unit 43 is rotated to press and stop both ends of the dust collecting paper 41, thereby collecting the dust collecting paper 41. It can be attached to the electrode 40. When the power is turned on, for example,-
A voltage of 6.5 kV is applied. In addition, as the dust collecting paper 41, kitchen paper or the like used in general households can be used.

On both sides of the dust collecting portion 6a, a pair of deodorizing portions 7 are arranged in a plane substantially parallel to the flow direction A of the ion wind. As shown in FIG. 2, each deodorizing section 7 is provided with a partition wall 7a at the center of a frame 9 having conductivity.
A storage portion for storing a deodorant 7b such as, for example, activated carbon is provided on both sides of the frame 9. Further, on both sides of the frame 9,
For fixing the deodorant 7b to the frame 9, a net-shaped deodorant cover 50 is provided. Further, the outside of each deodorant cover 50 is covered with an outside air blocking cover 8, and the outside air blocking cover 8 prevents the deodorant 7 b from being deteriorated when the deodorizing section 7 is not used. Further, as shown in FIG. 3, each deodorizing section 7 has a body cover 13
Are fixed to the main body cover 13 by a support portion 51 provided on the main body cover 13 in a state of being in close contact with the back surface of the main body cover 13, and the frame 9 having conductivity is electrically connected to the ground side of the circuit by a conductive material (for example, copper wire or the like). It is connected to the.

A second discharge electrode block 16 constituting the second ion wind inducing means 19 is disposed downstream of the dust collecting section 6a. The second discharge electrode block 16 is connected to the first discharge electrode block 16.
Like the discharge electrode block 15, the discharge part 3 is configured by the discharge part 3 for inducing ion wind and the counter electrode part 4, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. Further, between the second discharge electrode block 16 and the dust collecting portion 6a, positive ion blocking for preventing the movement of positive ions from the discharge portion 3 of the second discharge electrode block 16 to the dust collecting electrode 40 is performed. Means 80 are interposed. In the present embodiment, the positive ion blocking means 80 is constituted by a net 80a made of an insulating material such as a synthetic resin. As shown in FIG. 1, the net 80a is arranged so as to cross the air path, and also serves as a pre-filter.

On the downstream side of the second discharge electrode block 16, an ionization section 60 for discharging negative ions is provided.
Is arranged. As shown in FIGS. 7 and 8, the ionization unit 60 includes three ionization needles 61 facing upward.
And an ionization needle return electrode plate 62 disposed at a predetermined interval above the electrode. For example, a voltage of −6.5 kV is applied to the ionization needle 61, and the ionization needle
Is connected to the ground side of the circuit. In addition, the ionization needle 6
The number of 1 is not limited to this embodiment.

Next, the operation will be described. When the power switch of the air cleaner 1 having the above configuration is turned on, the discharge wires 31 and the counter electrode plate 35 of the first discharge electrode block 15 (the same applies to the second discharge electrode block 16) and the dust collection electrode 40 are turned on. Is applied. At this time, air near the discharge line 31 is ionized to generate positive ions, and the positive ions move toward the counter electrode plate 35 having a negative potential. The positive ions collide with molecules in the air during the movement, and the kinetic energy of the positive ions is given to the molecules in the air, so that the air moves. This is a wind called an ion wind, and an upward ion wind is generated by the movement of the molecules.

The suction air 11 on the lower surface of the main body 2 is moved in the direction of arrow A shown in FIG.
From the wind to the outlet 12 on the upper surface,
The dirty air in the room is sucked from the lower surface of the main body, and large dust is collected when passing through the pre-filter 20. Thereafter, in the first discharge electrode block 15, the dust B in the air collides with the positive ions. Is positively charged.
The positively charged dust B moves upward by the ionic wind and is attracted to the dust collecting electrode 40 of the dust collecting portion 6a having a negative potential by an electrostatic force, so that the dust collecting electrode 4
The dust adheres to the dust-collecting paper 41 covering 0. The odor molecules contained in the air pass through the deodorizing section 7 when the
Deodorizes and deodorizes by physical adsorption or chemical decomposition.

Thereafter, the ion wind is accelerated in the second discharge electrode block 16 according to the same principle as in the first discharge electrode block 15. At this time, the movement of the positive ions from the discharge portion 3 of the second discharge electrode block 16 to the dust collecting electrode 40 is prevented by the net 80a, and thus the dust charged to the positive ions and the second ions are prevented from moving. Positive ions sucked from the discharge portion 3 of the discharge electrode block 16 to the dust collecting electrode 40 do not repel each other, so that it is possible to prevent deterioration of dust collecting performance, and to prevent a decrease in ion wind speed to prevent air flow. Can be increased.

Further, negative ions are added by an ionization needle 61 of an ionization section 60 provided near the outlet 12. In the ionization unit 60, air near the tip of the ionization needle 61 is ionized to generate negative ions, and blows out along the lines of electric force generated between the ionization needle 61 and the grounded ionization needle electrode 62. The ion wind is led to the mouth 12 and further blows out the louver 7.
It is released into the room from zero.

As described above, the dirty air in the room is sucked into the main body 2 from the suction port 11 to perform deodorization and dust collection. Further, the ionization section 60 adds negative ions which are considered to be good for the human body. By doing so, the room can be filled with clean air. Here, as described above, the second ion wind inducing means 1 is provided downstream of the dust collecting portion 6a.
Since the second discharge electrode block 16 including the discharge unit 3 and the counter electrode unit 4 is disposed as 9, the ion wind speed from the suction port 11 on the lower surface of the main body 2 to the outlet 12 on the upper surface is weakened by the dust collection unit 6a. The second discharge electrode block 16
By increasing the speed, it is possible to suppress a decrease in the wind speed and increase the amount of blown air. In addition, since the net 80a made of an insulating material such as a synthetic resin is disposed between the dust collecting portion 6a and the second discharge electrode block 16, a part of the second discharge electrode block 16 from the discharge portion 3 is provided. Of the positive ions of the net 8 serving as the positive ion blocking means 80 even if the positive ions move to the dust collection electrode 40 to which the negative potential is applied.
By 0a, the movement of the positive ions is prevented, the deterioration of the dust collection performance can be prevented, and the cleaning effect of the indoor air can be further improved.

That is, when the positive ion blocking means 80 is not provided, as shown in FIG. 15, a part of positive ions from the discharge part 3 of the second discharge electrode block 16 is applied to the negative potential. The dust is attracted toward the dust electrode 40 by the electrostatic force, and the positive ions from the discharge part 3 of the second discharge electrode block 16 and the dust charged to the positive ions repel each other at the dust collecting electrode 40. However, there is a problem that the dust collection performance is deteriorated. In particular, if the discharge part 3 of the second discharge electrode block 16 and the dust collection electrode 40 are arranged close to each other in order to reduce the size of the air purifier, the discharge part 3 of the second discharge electrode block 16 may be disposed. The positive ions can easily move to the dust collecting electrode 40. Therefore, as shown in FIG. 1, a net 80a, which is a positive ion blocking means 80, is provided upstream of the discharge portion 3 of the second discharge electrode block 16 to collect from the discharge portion 3 of the second discharge electrode block 16. The movement of positive ions to the dust electrode 40 can be blocked. Therefore, while having a structure in which the second discharge block 16 is provided on the downstream side of the dust collecting part 6a, it is possible to prevent the deterioration of the dust collecting performance and to simultaneously make the air purifier compact. It will be. Besides,
Since the net 80a is made of an insulating material such as a synthetic resin,
The net 80a is positively charged by positive ions,
From the discharge part 3 of the second discharge electrode block 16 to the net 80a
Positive ions trying to move in the direction of
And cannot move to the dust collecting electrode 40, so that the dust collecting performance can be further improved. In addition, since the net 80a also serves as a pre-filter, dust that has not been collected can be captured by the net 80a, and there is no fear that the dust will be blown into the room as it is, and the air cleaning effect can be further enhanced. is there.

Further, since the surfaces of the dust collecting portion 6a and the deodorizing portion 7 are formed in parallel with the flow direction A of the ionic wind, molecules of the odor are deodorized in the deodorizing portion 7 by the flow of the wind. 7b, the flow of the ion wind is not obstructed by the deodorizing unit 7 and the dust collecting unit 6a, and the reduction of the ion wind speed can be suppressed. The air flow rate can be further increased, in combination with the positive ion blocking effect of the positive ion blocking means 80.

As shown in FIG. 14, a metal net 80b electrically connected to the ground is used as the positive ion blocking means 80 in place of the net 80a made of an insulating material. And the discharge part 3 of the second discharge electrode block 16. In this case, the positive ions from the discharge part 3 of the second discharge electrode block 16 are attracted to the metal net 80b and flow electrically to the ground, so that the positive ions can be prevented from moving to the dust collection electrode 40. become. In addition, since the metal net 80b also serves as a pre-filter, dust that has not been collected can be captured by the metal net 80b, and there is no fear that the dust will be blown into the room as it is, and the air cleaning effect can be further enhanced. Things.

[0025]

As described above, according to the first aspect of the present invention, the ion wind is induced by the kinetic energy of positive ions generated by the ionization of air, and the wind flowing from the suction side to the blowing side is generated. In the air purifier provided with an ion wind inducing means for forming a flow of air and an electric dust collecting means having a dust collecting electrode arranged substantially in parallel with the flow of the ion wind, a downstream side of the electric dust collecting means A second ion wind inducing means formed of a discharge portion and a counter electrode for inducing a second ion wind for accelerating the speed of the wind, and the second ion wind inducing means is electrically connected to the second ion wind inducing means. Since positive ion blocking means for preventing movement of positive ions from the discharge unit to the dust collecting electrode is interposed between the positive dust collecting means and
The second ion wind inducing means can prevent the reduction of the ion wind speed due to the pressure loss in the electric dust collecting means and increase the amount of air blown. In addition, since the positive ion blocking means can prevent some positive ions from moving from the discharge portion to the dust collecting electrode, deterioration of the dust collecting performance can be prevented and the indoor air cleaning effect can be further improved. Can be.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the positive ion blocking means is constituted by a net made of an insulating material. Positive ions moving from the discharge unit toward the net are repelled by the net and cannot move to the dust collecting electrode, so that the dust collecting performance can be further improved.

According to a third aspect of the present invention, in addition to the effect of the first aspect, the positive ion blocking means is formed of a net made of a conductive material and the net is grounded, so that the discharge from the discharge section is prevented. The positive ions are attracted to the net made of a conductive material and electrically flow to the ground, so that positive ions from the discharge unit can be reliably prevented from moving to the dust collection electrode.

According to a fourth aspect of the present invention, in addition to the effect of the second or third aspect, the net also serves as a pre-filter, so that dust not collected by the electric dust collecting means can be reduced. Thus, there is no fear that the dust is blown out into the room as it is, and the air cleaning effect can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same deodorizing part, partially broken away.

FIG. 3 is a perspective view illustrating an attached state of the deodorant unit according to the first embodiment.

FIG. 4 is a perspective view of the air cleaner according to the first embodiment;

FIG. 5 is a perspective view showing a state where the main body cover is removed.

FIG. 6 is a perspective view showing a state where the first and second discharge electrode blocks are removed.

FIG. 7 is a front sectional view of the main body.

FIG. 8 is a side sectional view of the main body.

FIG. 9 (a) is a schematic front view of the same pre-filter,
(B) is a side view.

FIG. 10 is a plan view illustrating a discharge electrode block of the above.

FIG. 11 is a perspective view of the discharge electrode block of the above.

FIG. 12 (a) is a side view of the discharge electrode block of the above,
(B) is a sectional plan view.

FIG. 13 is a perspective view of a dust collection unit according to the third embodiment.

FIG. 14 is a cross-sectional view of another embodiment.

FIG. 15 is an explanatory view in the case where the positive ion blocking means is not provided.

[Explanation of symbols]

 Reference Signs List 3 Discharge part 4 Counter electrode part 6 Electrical dust collecting means 19 Second ion wind inducing means 40 Dust collecting electrode 80 Positive ion blocking means 80a, 80b Net

Claims (4)

[Claims] 1. An ion wind inducing means for inducing an ion wind with kinetic energy of positive ions generated by ionization of air to form a wind flow from a suction side to a blowing side, and a downstream side of the ion wind inducing means. An electric dust collector having a dust collecting electrode disposed substantially parallel to the flow of the ion wind in the air purifier, on the downstream side of the electric dust collecting means, for accelerating the speed of the wind. A second ion wind inducing means formed by a discharge portion for inducing the second ion wind and a counter electrode is provided, and the discharge is generated between the second ion wind inducing means and the electric dust collecting means. An air purifier comprising a positive ion blocking means for preventing positive ions from moving from a portion to a dust collecting electrode. 2. The air purifier according to claim 1, wherein the positive ion blocking means is constituted by a net made of an insulating material. 3. The air purifier according to claim 1, wherein the positive ion blocking means is constituted by a net made of a conductive material, and the net is grounded. 4. The air purifier according to claim 2, wherein the net also serves as a pre-filter.